.page {
    width: 750px;
    margin: auto;
    text-align: center;
}

.Notshow {
    display: none;
}

.isShow {
    display: block;
}

.txt {
    text-align: left;
}

.delete {
    background-color: red;
    color: #fff;
}

.complate {
    background-color: greenyellow;
    color: #fff;
}

.notcomplate {
    background-color: lightblue;
    color: #b0b0b0;
}

.list {
    line-height: 50px;position: relative;
}

button {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}